RA55H3340M is a 330-400MHz 55W 12.5V 3 Stage Amp. For MOBILE RADIO, this module is designed for non-linear FM modulation, but may also be used for linear modulation by setting the quiescent drain current with the gate voltage and controlling the output power with the input power
The RA55H3340M is a 55‑watt RF MOSFET amplifier module designed for 12.5‑V mobile radios operating in the 330‑400 MHz band. It can be used for non‑linear FM modulation or, with proper biasing, for linear AM modulation.
The document lists electrical characteristics, maximum ratings, typical performance graphs, mechanical dimensions, and detailed recommendations for mounting, heat‑sink design, soldering, and ESD protection to ensure reliable operation in mobile communication equipment.
| Frequency Range | 330‑400 MHz |
|---|---|
| Output Power | 55 W |
| Drain Voltage (Vop) | <5 V |
| Gate Current | 1 mA (typ) |
| Input Power (Pin) | 100 mW |
| Total Efficiency | 35 % |
| Package Size | 66 × 21 × 9.88 mm |
| Operating Temperature Range | -30 °C to +110 °C |
| Storage Temperature Range | -40 °C to +110 °C |
Use M3 screws with a tightening torque of 4.0 to 6.0 kgf·cm.
Solder the leads after the module is mounted on the heat sink, keeping the soldering temperature below 350 °C and the soldering time under 3 seconds.
Nominal output power is available when the gate voltage is between about 4.5 V (typical) and 5 V (maximum).